/*
 * Copyright (C) 2012 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package interactivespaces.domain.support;

/**
 * A validator for activity values.
 *
 * @author Keith M. Hughes
 */
public interface Validator {

	/**
	 * Validate the given candidate.
	 * 
	 * @param candidate
	 * 		the candidate value
	 * 
	 * @return {@code true} if the candidate is valid
	 */
	boolean validate(String candidate);

	/**
	 * Get a description of the proper syntax
	 * 
	 * @return
	 */
	String getDescription();
}